DOGAMI Special Paper 20, Bentonite in Oregon: Occurrences .

Bentonite (including Ca-bentonitefﬁiller's earth) sold or used by domestic producers for speciﬁed uses ..... 4. 4. ... bcnttmitc was shipped from Seattle, while lower cost grades .. is fed into a primary crusher, slicer, or breaker unit. At this.

Basics in Minerals Processing -

Crusher - Wikipedia

A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. .. Primary crushing reduces the large pieces to a size which can be handled by the downstream machinery. .. It has the advantage of reliable construction, high productivity, easy adjustment and lower operational costs. The spring.